Research on a persistent red tone fluorescent polyacrylonitrile fiber with coaxial structure based on Sr2MgSi2O7:Eu2+, Dy3+ and Y2O2S:Eu3+, Mg2+, Ti4

In order to obtain a red fluorescent fiber with long persistent performance, Sr2MgSi2O7:Eu2+, Dy3+ and Y2O2S:Eu3+, Mg2+, Ti4+ phosphors were prepared by high-temperature solid-phase method, then the phosphors and Rhodamine B were spun into the Polyacrylonitrile (PAN) through coaxial wet-spinning. The structure and morphology of samples were characterized by the X-ray diffraction, high resolution transmission electron microscopy, X-ray photoelectron spectroscopy, scanning electron microscopy and particle size analyzer. Fluorescent properties were studied based on photoluminescence spectroscopy and afterglow decay curve. The data show that Sr2MgSi2O7 has blue broadband emission due to the electronic transition of Eu2+, and the Y2O2S has red linear emission spectrum because of the electronic transition of Eu3+.The analysis results reveal that the excellent afterglow performance of Sr2MgSi2O7 plays a significant role in the secondary excitation. Rhodamine B was added in the coaxial fiber as a red light compensator through transferring the blue light to red fluorescence. [Display omitted] •A novel red tone fluorescent fiber was obtained by coaxial wet-spinning method.•Phosphor Sr2MgSi2O7 work as a second light source in the fluorescent fiber.•The coaxial fluorescent fiber present better fluorescence performance than traditional fiber.